package cn.com.taiji.oospub.wechat.common.wxpay.common;

import javax.crypto.Cipher;
import java.io.*;
import java.security.Signature;
import java.security.*;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import java.util.HashMap;
import java.util.Map;

  
/** */

/**
 * <p> 
 * RSA公钥/私钥/签名工具包 
 * </p> 
 * <p> 
 * 罗纳德·李维斯特（Ron [R]ivest）、阿迪·萨莫尔（Adi [S]hamir）和伦纳德·阿德曼（Leonard [A]dleman） 
 * </p> 
 * <p> 
 * 字符串格式的密钥在未在特殊说明情况下都为BASE64编码格式<br/> 
 * 由于非对称加密速度极其缓慢，一般文件不使用它来加密而是使用对称加密，<br/> 
 * 非对称加密算法可以用来对对称加密的密钥加密，这样保证密钥的安全也就保证了数据的安全 
 * </p> 
 *  
 * @author IceWee 
 * @date 2012-4-26 
 * @version 1.0 
 */  
public class RSAUtils {  
  
    /** *//** 
     * 加密算法RSA 
     */  
    public static final String KEY_ALGORITHM = "RSA";  
      
    /** *//** 
     * 签名算法 
     */  
    public static final String SIGNATURE_ALGORITHM = "MD5withRSA";  
  
    /** *//** 
     * 获取公钥的key 
     */  
    private static final String PUBLIC_KEY = "RSAPublicKey";  
      
    /** *//** 
     * 获取私钥的key 
     */  
    private static final String PRIVATE_KEY = "RSAPrivateKey";  
      
    /** *//** 
     * RSA最大加密明文大小 
     */  
    private static final int MAX_ENCRYPT_BLOCK = 117;  
      
    /** *//** 
     * RSA最大解密密文大小 
     */  
    private static final int MAX_DECRYPT_BLOCK = 128;  
  
//    static ResourceBundle bundler = ResourceBundle.getBundle("sysConfig");
    /** *//** 
     * <p> 
     * 生成密钥对(公钥和私钥) 
     * </p> 
     *  
     * @return 
     * @throws Exception 
     */  
    public static Map<String, Object> genKeyPair() throws Exception {  
        KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance(KEY_ALGORITHM);  
        keyPairGen.initialize(1024);  
        KeyPair keyPair = keyPairGen.generateKeyPair();  
        RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();  
        RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();  
        Map<String, Object> keyMap = new HashMap<String, Object>(2);  
        keyMap.put(PUBLIC_KEY, publicKey);  
        keyMap.put(PRIVATE_KEY, privateKey);  
        return keyMap;  
    }  
      
    /** *//** 
     * <p> 
     * 用私钥对信息生成数字签名 
     * </p> 
     *  
     * @param data 已加密数据 
     * @param privateKey 私钥(BASE64编码) 
     *  
     * @return 
     * @throws Exception 
     */  
    public static String sign(byte[] data, String privateKey) throws Exception {  
        byte[] keyBytes = Base64Utils.decode(privateKey);  
        PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);  
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);  
        PrivateKey privateK = keyFactory.generatePrivate(pkcs8KeySpec);  
        Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);  
        signature.initSign(privateK);  
        signature.update(data);  
        return Base64Utils.encode(signature.sign());  
    }  
  
    /** *//** 
     * <p> 
     * 校验数字签名 
     * </p> 
     *  
     * @param data 已加密数据 
     * @param publicKey 公钥(BASE64编码) 
     * @param sign 数字签名 
     *  
     * @return 
     * @throws Exception 
     *  
     */  
    public static boolean verify(byte[] data, String publicKey, String sign)  
            throws Exception {  
        byte[] keyBytes = Base64Utils.decode(publicKey);  
        X509EncodedKeySpec keySpec = new X509EncodedKeySpec(keyBytes);  
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);  
        PublicKey publicK = keyFactory.generatePublic(keySpec);  
        Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);  
        signature.initVerify(publicK);  
        signature.update(data);  
        return signature.verify(Base64Utils.decode(sign));  
    }  
  
    /** *//** 
     * <P> 
     * 私钥解密 
     * </p> 
     *  
     * @param encryptedData 已加密数据 
     * @param privateKey 私钥(BASE64编码) 
     * @return 
     * @throws Exception 
     */  
    public static byte[] decryptByPrivateKey(byte[] encryptedData, String privateKey)  
            throws Exception {  
        byte[] keyBytes = Base64Utils.decode(privateKey);  
        PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);  
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);  
        Key privateK = keyFactory.generatePrivate(pkcs8KeySpec);  
        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());  
        cipher.init(Cipher.DECRYPT_MODE, privateK);  
        int inputLen = encryptedData.length;  
        ByteArrayOutputStream out = new ByteArrayOutputStream();  
        int offSet = 0;  
        byte[] cache;  
        int i = 0;  
        // 对数据分段解密  
        while (inputLen - offSet > 0) {  
            if (inputLen - offSet > MAX_DECRYPT_BLOCK) {  
                cache = cipher.doFinal(encryptedData, offSet, MAX_DECRYPT_BLOCK);  
            } else {  
                cache = cipher.doFinal(encryptedData, offSet, inputLen - offSet);  
            }  
            out.write(cache, 0, cache.length);  
            i++;  
            offSet = i * MAX_DECRYPT_BLOCK;  
        }  
        byte[] decryptedData = out.toByteArray();  
        out.close();  
        return decryptedData;  
    }  
  
    /** *//** 
     * <p> 
     * 公钥解密 
     * </p> 
     *  
     * @param encryptedData 已加密数据 
     * @param publicKey 公钥(BASE64编码) 
     * @return 
     * @throws Exception 
     */  
    public static byte[] decryptByPublicKey(byte[] encryptedData, String publicKey)  
            throws Exception {  
        byte[] keyBytes = Base64Utils.decode(publicKey);  
        X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);  
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);  
        Key publicK = keyFactory.generatePublic(x509KeySpec);  
        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());  
        cipher.init(Cipher.DECRYPT_MODE, publicK);  
        int inputLen = encryptedData.length;  
        ByteArrayOutputStream out = new ByteArrayOutputStream();  
        int offSet = 0;  
        byte[] cache;  
        int i = 0;  
        // 对数据分段解密  
        while (inputLen - offSet > 0) {  
            if (inputLen - offSet > MAX_DECRYPT_BLOCK) {  
                cache = cipher.doFinal(encryptedData, offSet, MAX_DECRYPT_BLOCK);  
            } else {  
                cache = cipher.doFinal(encryptedData, offSet, inputLen - offSet);  
            }  
            out.write(cache, 0, cache.length);  
            i++;  
            offSet = i * MAX_DECRYPT_BLOCK;  
        }  
        byte[] decryptedData = out.toByteArray();  
        out.close();  
        return decryptedData;  
    }  
  
    /** *//** 
     * <p> 
     * 公钥加密 
     * </p> 
     *  
     * @param data 源数据 
     * @param publicKey 公钥(BASE64编码) 
     * @return 
     * @throws Exception 
     */  
    public static byte[] encryptByPublicKey(byte[] data, String publicKey)  
            throws Exception {  
        byte[] keyBytes = Base64Utils.decode(publicKey);  
        X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);  
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);  
        Key publicK = keyFactory.generatePublic(x509KeySpec);  
        // 对数据加密  
        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());  
        cipher.init(Cipher.ENCRYPT_MODE, publicK);  
        int inputLen = data.length;  
        ByteArrayOutputStream out = new ByteArrayOutputStream();  
        int offSet = 0;  
        byte[] cache;  
        int i = 0;  
        // 对数据分段加密  
        while (inputLen - offSet > 0) {  
            if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {  
                cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);  
            } else {  
                cache = cipher.doFinal(data, offSet, inputLen - offSet);  
            }  
            out.write(cache, 0, cache.length);  
            i++;  
            offSet = i * MAX_ENCRYPT_BLOCK;  
        }  
        byte[] encryptedData = out.toByteArray();  
        out.close();  
        return encryptedData;  
    }  
  
    /** *//** 
     * <p> 
     * 私钥加密 
     * </p> 
     *  
     * @param data 源数据 
     * @param privateKey 私钥(BASE64编码) 
     * @return 
     * @throws Exception 
     */  
    public static byte[] encryptByPrivateKey(byte[] data, String privateKey)  
            throws Exception {  
        byte[] keyBytes = Base64Utils.decode(privateKey);  
        PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);  
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);  
        Key privateK = keyFactory.generatePrivate(pkcs8KeySpec);  
        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());  
        cipher.init(Cipher.ENCRYPT_MODE, privateK);  
        int inputLen = data.length;  
        ByteArrayOutputStream out = new ByteArrayOutputStream();  
        int offSet = 0;  
        byte[] cache;  
        int i = 0;  
        // 对数据分段加密  
        while (inputLen - offSet > 0) {  
            if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {  
                cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);  
            } else {  
                cache = cipher.doFinal(data, offSet, inputLen - offSet);  
            }  
            out.write(cache, 0, cache.length);  
            i++;  
            offSet = i * MAX_ENCRYPT_BLOCK;  
        }  
        byte[] encryptedData = out.toByteArray();  
        out.close();  
        return encryptedData;  
    }  
  
    /** *//** 
     * <p> 
     * 获取私钥 
     * </p> 
     *  
     * @param keyMap 密钥对 
     * @return 
     * @throws Exception 
     */  
    public static String getPrivateKey(Map<String, Object> keyMap)  
            throws Exception {  
        Key key = (Key) keyMap.get(PRIVATE_KEY);  
        return Base64Utils.encode(key.getEncoded());  
    }  
  
    /** *//** 
     * <p> 
     * 获取公钥 
     * </p> 
     *  
     * @param keyMap 密钥对 
     * @return 
     * @throws Exception 
     */  
    public static String getPublicKey(Map<String, Object> keyMap)  
            throws Exception {  
        Key key = (Key) keyMap.get(PUBLIC_KEY);  
        return Base64Utils.encode(key.getEncoded());  
    } 

    
    /** 
     *  
     * @param k 
     * @param data 
     * @param encrypt 
     *            1 加密 0解密 
     * @return 
     * @throws NoSuchPaddingException 
     * @throws Exception 
     */  
    public static byte[] handleData(Key k, byte[] data, int encrypt)  
            throws Exception {  
        if (k != null) {  
            Cipher cipher = Cipher.getInstance("RSA");  
            if (encrypt == 1) {  
            	System.out.println("data------"+data);
                cipher.init(Cipher.ENCRYPT_MODE, k);  
                byte[] resultBytes = cipher.doFinal(data); 
                System.out.println("resultBytes------"+resultBytes);
                return resultBytes;  
            } else if (encrypt == 0) {  
            	System.out.println("encrypt------"+encrypt);
            	System.out.println("k------"+k);
                cipher.init(Cipher.DECRYPT_MODE, k);
                System.out.println("data------"+data);
                byte[] resultBytes = cipher.doFinal(data);  
                System.out.println("kkkjj-----------lll"+resultBytes[0]);
                return resultBytes;  
            } else {  
                System.out.println("参数必须为: 1 加密 0解密");  
            }  
        }  
        return null;  
    }  
    
    
    public static void makekeyfile(String pubkeyfile, String privatekeyfile)  
	    throws NoSuchAlgorithmException, FileNotFoundException, IOException {  
		// KeyPairGenerator类用于生成公钥和私钥对，基于RSA算法生成对象  
		KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance("RSA");  
		// 初始化密钥对生成器，密钥大小为1024位  
		keyPairGen.initialize(2048);  
		// 生成一个密钥对，保存在keyPair中 
		KeyPair keyPair = keyPairGen.generateKeyPair();  
		
		// 得到私钥  
		RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();  
		
		// 得到公钥  
		RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();  
		
		// 生成私钥  
		ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(  
		        privatekeyfile));  
		oos.writeObject(privateKey);  
		oos.flush();  
		oos.close();  
		
		oos = new ObjectOutputStream(new FileOutputStream(pubkeyfile));  
		oos.writeObject(publicKey);  
		oos.flush();  
		oos.close();  
		
		System.out.println("make file ok!");  
	} 
    
    
    public static void main(String[] args) {
    	String ss="";
		try {
			
			
			

			String s ="q5vOTMiNnjgOjFnorFRUCuDktNtnxsyICQkaHbSOnEw7vHSYll5QSaXTx/BRv2AxfFiPBz6E6vdoBjJ0HkrOs8XUWG5jlubyo+smTg4SJB00DopB8xs8s1/mMb5/khMt9PN1Kh155Lb/9XDWakPdJeb2WlYxowOd/Sj55O8VPKky/jeEfqMhroHaDhcOhDsA33Eo02HD0ni/0fpswp+Fc/6Qdx7Tb+A6a7bejQZ99Kqs8TlSqO+b9yffTdAyAX8clGp9zij7z8f56RPS/YR35v53CIrPqVua/YVmkdgAlmJqjPOk+PByrX8bGOCM2bXsK63RPS9yLBVCuy/1YvRkZA==";
				   s ="cW5wxiUAqN592G7hRYOR+3yL0noVsdmEewxJMnQouzB87BxKPRxyxllZ/FC23Tlr8mfnCEYx6yCXXO8ttyi555urFkWolpOooPRua89i6u+6YpTBi1XrmP7k9p1SbKKwH71oH36TNDoCF0J5RrYY09v4XOiKwQV4sDPHZn8r1JdO+bm9aonL0NF/+DXtPiwStsSA2Z12D71IgUJFstYXxR+8miRYvl5M0+AkMJRHmCnXRiWsvUsmJRtxfMoOwSdhotkAL6UM33KnhO6Iab5H5SbOgNXvhXIjT9uBi6+XF1ebWALnEeAN5TzLarfCbDKJFat+H6n6Z9EhEc9U68aeOw==";
			ss = appRSAData(s,0);
//			ss = appRSAData("你好",1);
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    	System.out.println(ss);
	}
    
    /**
     * 
    * @Title: appRSAData
    * @Description: app KEY用RSA加解密数据
    * @param @param msg
    * @param @param encrypt 1公钥加密 0私钥解密
    * @param @return    参数
    * @return String    返回类型
     * @throws IOException 
     * @throws FileNotFoundException 
    * @throws
    * @author 高竺
    * @date 2016-8-8
     */
    @SuppressWarnings("resource")
	public static String appRSAData(String msg,int encrypt) throws Exception{
    	String retMsg = null;
    	 System.out.println("解密------------begin" );  
        String enc = "UTF-8";  
//        String appPath= bundler.getString("Path");
      //公钥
        System.out.println("解密-------------~~~~~~~" );  
        String pubfile = "d:/Tomcat8wss/webapps/oosweb/key/pub.key";
		String prifile = "d:/Tomcat8wss/webapps/oosweb/key/pri.key";
//        String pubfile = "e:/temp/pub.key";
//		String prifile = "e:/temp/pri.key";
		 System.out.println("解密------11111-------~~~~~~~" ); 
        ObjectInputStream ois = new ObjectInputStream(new FileInputStream(  
                pubfile));  
        System.out.println("ois-----+++++--------+++++----~-~~~~~~~"+ois); 
        System.out.println("msg-----+++++----~-----+++++----~~~~~~~"+msg);
        if(encrypt == 0){  
        	  System.out.println("解密-----2222----~~~~~~~" ); 
              ois = new ObjectInputStream(new FileInputStream(prifile)); 
              System.out.println("ois------3---~~~~~~~"+ois); 
              RSAPrivateKey prikey = (RSAPrivateKey) ois.readObject();  
              System.out.println("prikey------3---~~~~~~~"+prikey); 
              ois.close();  
              System.out.println("close-------------------close");
              System.out.println("msg-------------------msg"+msg);
              byte[]b =Base64Utils.decode(msg);
              System.out.println("bbbbbb-------------------"+b);
              byte[] deresult2 = handleData(prikey, b, 0);  
              System.out.println("解密-------------jiemi: " + new String(deresult2, enc)); 
              
              retMsg=new String(deresult2, enc);
              System.out.println("retMsg解密-------------: " + retMsg); 
        }else{
        	 RSAPublicKey pubkey = (RSAPublicKey) ois.readObject();  
             ois.close();  
             byte[] result2 = handleData(pubkey, msg.getBytes(enc), 1);  
             retMsg =Base64Utils.encode(result2);
             System.out.println("加密: " + retMsg); 
            
        }
    	return retMsg;
    
    }
   
	
}  